Short answer: the KEF LS50 Wireless II for better sound quality, the KEF LSX II for the lower price. The KEF LS50 Wireless II ranks #19 of 108 powered bookshelf speakers, rated 4.3/5, at $2,999.99. The KEF LSX II ranks #8, rated 4.1/5, at $1,499.99, $1,500 cheaper.
The case for the KEF LS50 Wireless II: Erin’s measurements give preference scores of 5.43 standalone and 7.51 with an ideal subwoofer, with a -3dB point around 51Hz. Watch for: The 3.0dB response span is good but not reference-leading, and dispersion still varies with frequency.
What the KEF LSX II does well: Full-featured active stereo bookshelf system featuring an 11th-generation 4.5-inch Uni-Q driver with 200W of system bi-amplification. Watch for: Compact 4.5-inch drivers run into bass compression and rising distortion beyond 88dB/1m, making the system ideal for desktop and small-room listening rather than large living areas without a companion subwoofer.
Buy the KEF LS50 Wireless II if sound quality is the priority over the price, or the KEF LSX II if the price is the priority over sound quality.
About the ratings: the KEF LSX II’s rating is estimated from measured siblings and predecessors rather than its own measurements, with a likely range of 3.9 to 4.3, so this verdict could change once it is measured.
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Specifications Side By Side
| KEF LS50 Wireless II | KEF LSX II | |
|---|---|---|
| Price | $2,999.99 per pair | $1,499.99 per pair |
| Ranked | #19 of 108 in Medium Size Powered Bookshelf Speakers | #8 of 47 in Small Size Powered Bookshelf Speakers Estimated |
| Bass Extension (-10dB) | 41.5Hz (measured, spinorama.org) | - |
| Bass Extension (-3dB) | 51.3Hz (measured, spinorama.org) | - |
| Inputs | HDMI eARC, optical, digital coaxial, 3.5mm analog, USB-A (service), Ethernet | - |
| Drivers | Uni-Q coincident array: 130mm aluminum woofer + 25mm MAT aluminum dome tweeter | 0.75” aluminum dome tweeter, 4.5” magnesium/aluminum alloy cone woofer |
| App | KEF Connect (placement EQ presets, source selection, firmware updates) | - |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 4.2 | 5.0 |
| EQ | Yes, fixed placement presets (desk/bookshelf/wall-mount) - no automatic room correction | - |
| Weight | 44.3 lbs (20.1 kg) for the pair | 15.9 lbs (7.2 kg) |
| Amplifier Power | 280W (LF) + 100W (HF) per speaker, bi-amped | 200W |
| Dimensions | 12” x 7.9” x 12.2” (305 x 200 x 311 mm) each | 9.4”H x 6.1”W x 7.1”D (240 x 155 x 180 mm) |
| Frequency Response | 45Hz - 28kHz ±3dB | 54Hz - 28kHz (±3dB) (manufacturer specified) |
| Maximum SPL | 108dB at 1m (manufacturer specified) | 102 dB |
| Spinorama Preference Score | 5.43 | - |
| Spinorama Preference Score with Perfect Sub | 7.51 | - |
| Subwoofer Output | Yes | Yes |
| Outputs | RCA subwoofer | - |
| XLR Input | No | - |
| RCA Input | No | - |
| TRS Input | No | - |
| Optical Input | Yes | Yes |
| Coaxial Input | Yes | - |
| USB Input | No | Yes |
| HDMI Input | Yes | Yes |
| AES Input | No | - |
| Aux Input | Yes | Yes |
| Enclosure | - | ported, rear |
| Wi-Fi | - | Yes |
| Ethernet | - | Yes |
| Stereo | - | pair |
| Cabinet Color | - | Carbon Black, Mineral White, Cobalt Blue, Lava Red, Soundwave by Terence Conran |
| Country | - | United Kingdom |
Related Speaker Comparisons
More worthwhile head-to-heads for KEF LSX II:
- KEF LS50 Wireless II vs IK Multimedia iLoud MTM
- Genelec 8020D vs KEF LS50 Wireless II
- Genelec 8320A vs KEF LS50 Wireless II
- Genelec 8030C vs KEF LS50 Wireless II
- Neumann KH80 DSP vs KEF LS50 Wireless II
Prices on this page were last checked October 11, 2026 at 4:59 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
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The Two Speakers In Full
KEF LS50 Wireless II: $2,999.99 per pair Amazon $2,999.99 KEF $2,999.99 Crutchfield $2,999.99 eBay
Same family: the KEF LSX II LT (smaller bookshelf, ranked lower, rated 4/5), the KEF LSX II (smaller bookshelf, estimated 4.1/5) and the KEF LS60 (floorstanding, rated 4.8/5).
Pros: Erin’s measurements give preference scores of 5.43 standalone and 7.51 with an ideal subwoofer, with a -3dB point around 51Hz. The coincident Uni-Q layout helps preserve tonal consistency across horizontal and vertical listening positions. Low listening-window narrow-band deviation of 0.308 supports relatively clean midrange reproduction. HDMI eARC and streaming functions make it a capable all-in-one stereo system. Measured bass extension of 51.3Hz (-3dB).
Cons: The 3.0dB response span is good but not reference-leading, and dispersion still varies with frequency. Compact bass drivers limit deep-bass output. App placement adjustments are not the same as microphone-based automatic room correction. The price and primary/secondary architecture are practical trade-offs; neither driver geometry nor a single directivity statistic guarantees the best sound in every room.
Full KEF LS50 Wireless II review and specifications →
| Released | 2020 (6 years ago) |
|---|---|
| AES Input | No |
| Amplifier Power | 280W (LF) + 100W (HF) per speaker, bi-amped |
| App | KEF Connect (placement EQ presets, source selection, firmware updates) |
| Aux Input | Yes |
| Bass Extension (-10dB) | 41.5Hz (measured, spinorama.org) |
| Bass Extension (-3dB) | 51.3Hz (measured, spinorama.org) |
| Bluetooth | Yes |
| Bluetooth Version | 4.2 |
| Coaxial Input | Yes |
| Dimensions | 12” x 7.9” x 12.2” (305 x 200 x 311 mm) each |
| Drivers | Uni-Q coincident array: 130mm aluminum woofer + 25mm MAT aluminum dome tweeter |
| EQ | Yes, fixed placement presets (desk/bookshelf/wall-mount) - no automatic room correction |
| Frequency Response | 45Hz - 28kHz ±3dB |
| HDMI Input | Yes |
| Inputs | HDMI eARC, optical, digital coaxial, 3.5mm analog, USB-A (service), Ethernet |
| Maximum SPL | 108dB at 1m (manufacturer specified) |
| Optical Input | Yes |
| Outputs | RCA subwoofer |
| RCA Input | No |
| Spinorama Preference Score | 5.43 |
| Spinorama Preference Score with Perfect Sub | 7.51 |
| Subwoofer Output | Yes |
| TRS Input | No |
| USB Input | No |
| Weight | 44.3 lbs (20.1 kg) for the pair |
| XLR Input | No |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- KEF LS50 Wireless II vs JBL 305P MKII
- KEF LS50 Wireless II vs Vanatoo Transparent One Encore Plus
- KEF LS50 Wireless II vs Klipsch The Fives
- KEF LS50 Wireless II vs IK Multimedia iLoud MTM MKII
- KEF LS50 Wireless II vs Genelec 8020D
- KEF LS50 Wireless II vs Kali Audio SM-5
- KEF LS50 Wireless II vs Kali Audio IN-5
- KEF LS50 Wireless II vs Devialet Phantom II 98 dB
- See all 48 comparisons
KEF LSX II: $1,499.99 per pair Estimated Amazon $1,499.99 KEF $1,499.99 eBay
Same family: the KEF LSX II LT (smaller bookshelf, rated 4/5), the KEF LS50 Wireless II (larger bookshelf, rated 4.3/5) and the KEF LS60 (floorstanding, rated 4.8/5).
Pros: Full-featured active stereo bookshelf system featuring an 11th-generation 4.5-inch Uni-Q driver with 200W of system bi-amplification. Unlike the LT variant, it includes 3.5mm analog auxiliary input, Roon Ready certification, wireless inter-speaker pairing without requiring a tether cable, and expanded streaming options over dual-band Wi-Fi (AirPlay 2, Chromecast, Spotify Connect, Tidal Connect) plus HDMI ARC and USB-C.
Cons: Compact 4.5-inch drivers run into bass compression and rising distortion beyond 88dB/1m, making the system ideal for desktop and small-room listening rather than large living areas without a companion subwoofer.
Full KEF LSX II review and specifications →
| Amplifier Power | 200W |
|---|---|
| Aux Input | Yes |
| Bluetooth | Yes |
| Bluetooth Version | 5.0 |
| Cabinet Color | Carbon Black, Mineral White, Cobalt Blue, Lava Red, Soundwave by Terence Conran |
| Country | United Kingdom |
| Dimensions | 9.4”H x 6.1”W x 7.1”D (240 x 155 x 180 mm) |
| Drivers | 0.75” aluminum dome tweeter, 4.5” magnesium/aluminum alloy cone woofer |
| Enclosure | ported, rear |
| Ethernet | Yes |
| Frequency Response | 54Hz - 28kHz (±3dB) (manufacturer specified) |
| HDMI Input | Yes |
| Maximum SPL | 102 dB |
| Optical Input | Yes |
| Stereo | pair |
| Subwoofer Output | Yes |
| USB Input | Yes |
| Weight | 15.9 lbs (7.2 kg) |
| Wi-Fi | Yes |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons